Ryobi Grinder AG402 User Guide

OPERATOR’S MANUAL  
4-1/2 in. ANGLE GRINDER  
DOUBLE INSULATED  
AG402  
Your angle grinder has been engineered and manufactured to our high standard for dependability, ease of operation, and  
operator safety. When properly cared for, it will give you years of rugged, trouble-free performance.  
WARNING: To reduce the risk of injury, the user must read and understand the operator’s manual before using  
this product.  
Thank you for your purchase.  
SAVE THIS MANUAL FOR FUTURE REFERENCE  
 
GENERAL SAFETY RULES  
Avoid accidental starting. Be sure switch is off  
WARNING:  
before plugging in. Carrying tools with your finger on  
the switch or plugging in tools that have the switch on  
invites accidents.  
Read and understand all instructions. Failure to follow  
all instructions listed below, may result in electric shock,  
fire and/or serious personal injury.  
Remove adjusting keys or wrenches before turning  
the tool on. A wrench or a key that is left attached to a  
rotating part of the tool may result in personal injury.  
SAVE THESE INSTRUCTIONS  
WORK AREA  
Do not overreach. Keep proper footing and balance  
at all times. Proper footing and balance enables better  
control of the tool in unexpected situations.  
Use safety equipment. Always wear eye protection.  
Dust mask, nonskid safety shoes, hard hat, or hearing  
protection must be used for appropriate conditions.  
Keep your work area clean and well lit. Cluttered  
benches and dark areas invite accidents.  
Do not operate power tools in explosive atmospheres,  
such as in the presence of flammable liquids, gases, Do not wear loose clothing or jewelry. Contain long  
or dust. Power tools create sparks which may ignite the  
dust or fumes.  
hair. Loose clothes, jewelry, or long hair can be drawn  
into air vents.  
Do not use on a ladder or unstable support. Stable  
footing on a solid surface enables better control of the  
tool in unexpected situations.  
Keep bystanders, children, and visitors away while  
operating a power tool. Distractions can cause you to  
lose control.  
TOOL USE AND CARE  
ELECTRICAL SAFETY  
Use clamps or other practical way to secure and  
support the workpiece to a stable platform. Holding  
the work by hand or against your body is unstable and  
may lead to loss of control.  
Do not force tool. Use the correct tool for your ap-  
plication. The correct tool will do the job better and safer  
at the rate for which it is designed.  
Double insulated tools are equipped with a polarized  
plug (one blade is wider than the other). This plug will  
fit in a polarized outlet only one way. If the plug does  
not fit fully in the outlet, reverse the plug. If it still  
does not fit, contact a qualified electrician to install a  
polarized outlet. Do not change the plug in any way.  
Double insulation  
eliminates the need for the three-  
wire grounded power cord and grounded power supply  
system.  
Do not use tool if switch does not turn it on or off. Any  
tool that cannot be controlled with the switch is dangerous  
and must be repaired.  
Disconnect the plug from power source before making  
any adjustments, changing accessories, or storing the  
tool. Such preventive safety measures reduce the risk of  
starting the tool accidentally.  
Store idle tools out of the reach of children and other  
untrained persons. Tools are dangerous in the hands of  
untrained users.  
Maintain tools with care. Keep cutting tools sharp  
and clean. Properly maintained tools with sharp cutting  
edges are less likely to bind and are easier to control.  
Avoid body contact with grounded surfaces such as  
pipes, radiators, ranges, and refrigerators. There is an  
increased risk of electric shock if your body is grounded.  
Don’t expose power tools to rain or wet conditions.  
Water entering a power tool will increase the risk of electric  
shock.  
Do not abuse the cord. Never use the cord to carry the  
tools or pull the plug from an outlet. Keep cord away  
from heat, oil, sharp edges, or moving parts. Replace  
damaged cords immediately. Damaged cords increase  
the risk of electric shock.  
Check for misalignment or binding of moving parts,  
breakage of parts, and any other condition that may  
affect the tool’s operation. If damaged, have the tool  
serviced before using. Many accidents are caused by  
poorly maintained tools.  
Use only accessories that are recommended by the  
manufacturer for your model. Accessories that may be  
suitable for one tool, may become hazardous when used  
on another tool.  
Keep the tool and its handle dry, clean and free from  
oil and grease. Always use a clean cloth when clean-  
ing. Never use brake fluids, gasoline, petroleum-based  
products, or any strong solvents to clean your tool.  
Following this rule will reduce the risk of loss of control  
and deterioration of the enclosure plastic.  
When operating a power tool outside, use an outdoor  
extension cord marked “W-A” or “W”. These cords are rat-  
ed for outdoor use and reduce the risk of electric shock.  
PERSONAL SAFETY  
Stay alert, watch what you are doing and use common  
sense when operating a power tool. Do not use tool  
while tired or under the influence of drugs, alcohol,  
or medication. A moment of inattention while operating  
power tools may result in serious personal injury.  
Dress properly. Do not wear loose clothing or jewelry.  
Contain long hair. Keep your hair, clothing, and gloves  
away from moving parts. Loose clothes, jewelry, or long  
hair can be caught in moving parts.  
3
 
GENERAL SAFETY RULES  
When servicing a tool, use only identical replacement  
SERVICE  
parts. Follow instructions in the Maintenance section  
of this manual. Use of unauthorized parts or failure to  
follow Maintenance Instructions may create a risk of  
shock or injury.  
Tool service must be performed only by qualified  
repair personnel. Service or maintenance performed by  
unqualified personnel may result in a risk of injury.  
SPECIFIC SAFETY RULES  
Always use proper guard with grinding wheel. A Check damaged parts. Before further use of the  
guard protects operator from broken wheel fragments.  
tool, a guard or other part that is damaged should  
be carefully checked to determine that it will operate  
properly and perform its intended function. Check for  
alignment of moving parts, binding of moving parts,  
breakage of parts, mounting, and any other conditions  
that may affect its operation. A guard or other part that  
is damaged should be properly repaired or replaced  
by an authorized service center. Following this rule will  
reduce the risk of shock, fire, or serious injury.  
Accessories must be rated for at least the speed  
recommended on the tool warning label. Wheels and  
other accessories running over rated speed can fly apart  
and cause injury.  
Hold tool by insulated gripping surfaces when  
performing an operation where the cutting tool may  
contact hidden wiring or its own cord. Contact with a  
“live” wire will make exposed metal parts of the cutting  
tool “live” and shock the operator.  
Make sure your extension cord is in good condi-  
tion. When using an extension cord, be sure to use  
one heavy enough to carry the current your product  
will draw. A wire gauge size (A.W.G.) of at least 16 is  
recommended for an extension cord 50 feet or less  
in length. A cord exceeding 100 feet is not recom-  
mended. If in doubt, use the next heavier gauge. The  
smaller the gauge number, the heavier the cord. An  
undersized cord will cause a drop in line voltage resulting  
in loss of power and overheating.  
Use side handles supplied with the tool. Loss of control  
can cause personal injury.  
Know your power tool. Read operator’s manual care-  
fully. Learn its applications and limitations, as well  
as the specific potential hazards related to this tool.  
Following this rule will reduce the risk of electric shock,  
fire, or serious injury.  
Always wear safety glasses. Everyday eyeglasses  
have only impact-resistant lenses; they are NOT safety  
glasses. Following this rule will reduce the risk of serious  
personal injury.  
Inspect for and remove all nails from lumber before  
using this tool. Following this rule will reduce the risk of  
serious personal injury.  
Protect your lungs. Wear a face or dust mask if the  
operation is dusty. Following this rule will reduce the risk  
of serious personal injury.  
Ifthepowersupplycordisdamaged,itmustbereplaced  
only by the manufacturer or by an authorized service  
center to avoid risk.  
Protect your hearing. Wear hearing protection during  
extended periods of operation. Following this rule will  
reduce the risk of serious personal injury.  
Save these instructions. Refer to them frequently and  
use them to instruct others who may use this tool. If you  
loan someone this tool, loan them these instructions  
also.  
Inspect tool cords periodically and, if damaged, have  
repaired at your nearest Authorized Service Center.  
Constantly stay aware of cord location. Following this  
rule will reduce the risk of electric shock or fire.  
4
 
SYMBOLS  
Someofthefollowingsymbolsmaybeusedonthistool. Pleasestudythemandlearntheirmeaning. Properinterpretation  
of these symbols will allow you to operate the tool better and safer.  
SYMBOL  
NAME  
DESIGNATION/EXPLANATION  
V
Volts  
Voltage  
Current  
A
Hz  
W
Amperes  
Hertz  
Frequency (cycles per second)  
Power  
Watt  
min  
Minutes  
Time  
Alternating Current  
Direct Current  
Type of current  
Type or a characteristic of current  
Rotational speed, at no load  
Double-insulated construction  
Revolutions, strokes, surface speed, orbits etc., per minute  
n
o
No Load Speed  
Class II Construction  
Per Minute  
.../min  
Wet Conditions Alert  
Do not expose to rain or use in damp locations.  
To reduce the risk of injury, user must read and understand  
operator’s manual before using this product.  
Read The Operator’s Manual  
Always wear safety goggles or safety glasses with side shields and,  
as necessary, a full face shield when operating this product.  
Eye Protection  
Safety Alert  
Precautions that involve your safety.  
Failure to keep your hands away from the blade will result in serious  
personal injury.  
No Hands Symbol  
Failure to keep your hands away from the blade will result in serious  
personal injury.  
No Hands Symbol  
No Hands Symbol  
No Hands Symbol  
Failure to keep your hands away from the blade will result in serious  
personal injury.  
Failure to keep your hands away from the blade will result in serious  
personal injury.  
To reduce the risk of injury or damage, avoid contact with any hot  
surface.  
Hot Surface  
5
 
SYMBOLS  
The following signal words and meanings are intended to explain the levels of risk associated with this product.  
SYMBOL  
SIGNAL  
MEANING  
Indicates an imminently hazardous situation, which, if not avoided, will result  
in death or serious injury.  
DANGER:  
Indicates a potentially hazardous situation, which, if not avoided, could result  
in death or serious injury.  
WARNING:  
CAUTION:  
CAUTION:  
Indicates a potentially hazardous situation, which, if not avoided, may result in  
minor or moderate injury.  
(Without Safety Alert Symbol) Indicates a situation that may result in property  
damage.  
SERVICE  
WARNING:  
Servicing requires extreme care and knowledge and should  
be performed only by a qualified service technician. For  
service we suggest you return the product to the nearest  
AUTHORIZED SERVICE CENTER for repair. When servic-  
ing, use only identical replacement parts.  
To avoid serious personal injury, do not attempt to use this  
product until you read thoroughly and understand com-  
pletely the operator’s manual. If you do not understand  
the warnings and instructions in the operator’s manual,  
do not use this product. Call Ryobi customer service for  
assistance.  
WARNING:  
The operation of any power tool can result in foreign objects being thrown into your eyes, which can  
result in severe eye damage. Before beginning power tool operation, always wear safety goggles or  
safety glasses with side shields and, when needed, a full face shield. We recommend Wide Vision  
Safety Mask for use over eyeglasses or standard safety glasses with side shields. Always use eye  
protection which is marked to comply with ANSI Z87.1.  
SAVE THESE INSTRUCTIONS  
6
 
ELECTRICAL  
DOUBLE INSULATION  
EXTENSION CORDS  
Double insulation is a concept in safety in electric power  
tools, which eliminates the need for the usual three-  
wire grounded power cord. All exposed metal parts are  
isolated from the internal metal motor components with  
protecting insulation. Double insulated tools do not need  
to be grounded.  
When using a power tool at a considerable distance from  
a power source, be sure to use an extension cord that has  
the capacity to handle the current the tool will draw. An  
undersized cord will cause a drop in line voltage, resulting in  
overheating and loss of power. Use the chart to determine  
the minimum wire size required in an extension cord. Only  
round jacketed cords listed by Underwriter’s Laboratories  
(UL) should be used.  
WARNING:  
When working outdoors with a tool, use an extension cord  
that is designed for outside use. This type of cord is desig-  
nated with “WA” on the cord’s jacket.  
The double insulated system is intended to protect  
the user from shock resulting from a break in the tool’s  
internal insulation. Observe all normal safety precautions  
to avoid electrical shock.  
Before using any extension cord, inspect it for loose or  
exposed wires and cut or worn insulation.  
NOTE: Servicing of a tool with double insulation requires  
extreme care and knowledge of the system and should be  
performedonlybyaqualifiedservicetechnician. Forservice,  
we suggest you return the tool to your nearest authorized  
service center for repair. Always use original factory replace-  
ment parts when servicing.  
**Ampere rating (on tool data plate)  
0-2.0  
2.1-3.4 3.5-5.0 5.1-7.0 7.1-12.0 12.1-16.0  
Cord Length  
Wire Size (A.W.G.)  
25'  
50'  
16  
16  
16  
16  
16  
16  
16  
16  
14  
16  
14  
12  
14  
14  
10  
14  
12  
ELECTRICAL CONNECTION  
100'  
This tool has a precision-built electric motor. It should be  
connected to a power supply that is 120 volts, 60 Hz, AC  
only (normal household current). Do not operate this tool  
on direct current (DC). A substantial voltage drop will cause  
a loss of power and the motor will overheat. If the tool does  
not operate when plugged into an outlet, double-check the  
power supply.  
**Used on 12 gauge - 20 amp circuit.  
NOTE: AWG = American Wire Gauge  
WARNING:  
Keep the extension cord clear of the working area.  
Position the cord so that it will not get caught on lumber,  
tools or other obstructions while you are working with a  
power tool. Failure to do so can result in serious personal  
injury.  
WARNING:  
Check extension cords before each use. If damaged  
replace immediately. Never use tool with a damaged cord  
since touching the damaged area could cause electrical  
shock resulting in serious injury.  
7
 
FEATURES  
PRODUCT SPECIFICATIONS  
Wheel Size.............................................................4 1/2 in.  
Cord Length ...............................................................10 ft.  
Arbor Size................................................ 5/8 in. x 11 UNC  
No Load Speed ..................................11,000 r/min. (RPM)  
Input ............................... 120 V, 60 Hz, AC only, 4.4 Amps  
Net Weight.............................................................. 4.1 lbs.  
SPINDLE  
LOCK  
SIDE HANDLE  
WRENCH  
STORAGE  
WRENCH  
GUARD  
Fig. 1  
KNOW YOUR ANGLE GRINDER  
See Figure 1.  
SIDE HANDLE  
The side handle can be installed on the left or right side of  
the grinder, depending on operator preference, for stabili-  
zation and must be used during all operations. In addition  
to maintaining safe control during use, the side handle also  
provides convenient ease of operation for the operator.  
The safe use of this product requires an understanding of  
the information on the tool and in this operator’s manual as  
well as a knowledge of the project you are attempting. Before  
use of this product, familiarize yourself with all operating  
features and safety rules.  
SPINDLE LOCK  
The spindle lock keeps the spindle from turning while install-  
ing and removing wheels and disks.  
WRENCH STORAGE  
The wrench can be easily stored in the side handle when  
not in use.  
8
 
ASSEMBLY  
UNPACKING  
This product requires assembly.  
WARNING:  
Thoroughly inspect a new grinding wheel before you  
install it on the grinder.  
Carefully remove the tool and any accessories from the  
box. Make sure that all items listed in the packing list are  
included.  
Tap lightly around the wheel using a wooden hammer.  
Inspect the tool carefully to make sure no breakage or  
damage occurred during shipping.  
•Listen carefully to the resulting sounds. Places with fis-  
sures or cracks will result in a different sound.  
Do not discard the packing material until you have care-  
fully inspected and satisfactorily operated the tool.  
Do not use a wheel containing fissures or cracks.  
If any parts are damaged or missing, please call  
1-800-525-2579 for assistance.  
When you install a new grinding wheel, carry out a no  
load revolution test of approximately one minute with  
the grinding wheel facing a safe direction, i.e., away from  
people or objects.  
PACKING LIST  
Angle Grinder  
Wrench  
Disc Flange  
Flange Nut  
WARNING:  
Side Handle  
The side handle must always be used to help prevent  
loss of control and possible serious injury.  
Grinding Wheel  
Operator’s Manual  
WARNING:  
If any parts are damaged or missing do not operate  
this tool until the parts are replaced. Failure to heed this  
warning could result in serious personal injury.  
SIDE  
HANDLE  
TO  
LOOSEN  
TO  
TIGHTEN  
WARNING:  
Fig. 2  
Do not attempt to modify this tool or create accesso-  
ries not recommended for use with this tool. Any such  
alteration or modification is misuse and could result in a  
hazardous condition leading to possible serious personal  
injury.  
INSTALLING THE SIDE HANDLE  
See Figure 2.  
Unplug the angle grinder.  
Insert the side handle into the desired operating  
position.  
WARNING:  
Securely tighten by turning the side handle clockwise.  
Do not connect to power supply until assembly is  
complete. Failure to comply could result in accidental  
starting and possible serious personal injury.  
NOTE: You can install the handle on the left or right side of  
the grinder depending on operator preference.  
9
 
OPERATION  
WARNING:  
Do not allow familiarity with tools to make you care-  
less. Remember that a careless fraction of a second is  
sufficient to inflict serious injury.  
WARNING:  
Always wear safety goggles or safety glasses with side  
shields when operating power tools. Failure to do so  
could result in objects being thrown into your eyes  
resulting in possible serious injury.  
SLIDE  
SWITCH  
Fig. 3  
WARNING:  
WARNING:  
Do not use any attachments or accessories not  
recommended by the manufacturer of this tool. The use  
of attachments or accessories not recommended can  
result in serious personal injury.  
Always install grinding wheel and abrasive mop disc with  
the depressed center against the disc flange as shown  
on the opposite page. Failure to do so will cause the  
grinding wheel to crack when tightening the clamp nut.  
This could result in serious personal injury because of  
loose particles breaking off and being thrown from the  
angle grinder. Do not overtighten.  
APPLICATIONS  
You may use this tool for the purposes listed below:  
Grinding metals  
Threadtheflangenutonthespindlewiththeflatsideofnut  
facing up. Fit raised, small diameter portion of the clamp  
nut into the hole in the wheel and finger tighten.  
To install abrasive mop disc, thread the nut on the spindle  
with the flat side of flange nut facing down. Finger  
tighten.  
Depress and hold the spindle lock button and rotate the  
wheel clockwise until the spindle locks in position.  
Securely tighten the nut with the wrench provided.  
Do not overtighten.  
Sanding wood or metal surfaces  
SLIDE SWITCH  
See Figure 3.  
To turn the angle grinder ON, press the slide switch forward.  
To the lock the grinder in the ON position, depress front of  
switch To turn it OFF, push slide switch forward.  
CAUTION:  
Never cover air vents. They must always be open for  
proper motor cooling.  
DANGER:  
Never attach a wood cutting or carving blade of any type  
to this angle grinder. It is only designed for grinding and  
sanding. Use for any other purpose is not recommended  
and creates a hazard, which will result in serious injury.  
INSTALLING ACCESSORY WHEELS  
See Figure 4.  
Unplug the angle grinder.  
Depress and hold the spindle lock button and rotate nut  
with provided wrench until spindle locks.  
NOTE: To prevent damage to the spindle or spindle lock,  
always allow motor to come to a complete stop before  
engaging spindle lock.  
Loosen and remove flange nut from spindle. Do not  
remove disc flange.  
Make sure flats on the bottom of disc flange are engaged  
with flats on spindle.  
Place the accessory wheel over the spindle.  
10  
 
OPERATION  
GRINDING AND SANDING  
See Figures 4 - 5.  
TO  
TIGHTEN  
WRENCH  
Always carefully select and use grinding wheels that are  
recommended for the material to be ground.  
TO  
LOOSEN  
Make sure that the minimum operating speed of any  
FLANGE  
NUT  
accessory wheel selected is not less than 11,000 RPM.  
The grinding wheel provided with the angle grinder is suit-  
able for grinding welds, preparing surfaces to be welded,  
grinding structural steel, and grinding stainless steel.  
GRINDING  
WHEEL  
Secure all work before beginning any operation.  
Secure small workpieces in a vise or clamp to a work-  
bench.  
DISC  
FLANGE  
SPINDLE  
The key to efficient operation is by controlling the pres-  
sure and surface contact between the grinding wheel and  
workpiece.  
Flat surfaces are ground at an acute angle, normally  
between 5° and 15°.  
For maximum control, hold the angle grinder in front and  
away from you with both hands, keeping the grinding  
wheel clear of the workpiece.  
FLAT(S)  
SPINDLE  
LOCK BUTTON  
Start the angle grinder and let the motor and grinding  
wheel build up to full speed.  
Fig. 4  
Gradually lower angle grinder until the grinding wheel  
contacts the workpiece.  
For best results keep the angle grinder tilted at an angle  
from 5° and 15° and continuously moving at a steady,  
consistent pace.  
Move the angle grinder back and forth or up and down  
over the work area.  
5° TO 15°  
Keep the angle grinder moving so that an excessive  
amount of material is not removed from one area.  
Fig. 5  
If the angle grinder is held in one spot too long, it will  
gouge and cut grooves in the workpiece.  
If the angle grinder is held at too sharp an angle, it will  
also gouge the workpiece because of concentration of  
pressure on a small area.  
WARNING:  
Before performing any adjustment, make sure the tool  
is unplugged from the power supply and the switch is in  
the OFF ( O ) position. Failure to heed this warning could  
result in serious personal injury.  
Use just enough pressure to keep the angle grinder from  
chattering or bouncing. Heavy pressure will decrease its  
speed and put a strain on the motor.  
Normally the weight of the tool alone is adequate for most  
grinding jobs.  
Use light pressure when grinding jagged edges or loose  
bolts where there is the potential for the angle grinder to  
snag on the metal edge.  
Lift the angle grinder away from the workpiece before  
turning the angle grinder off.  
NOTE: Only the grinding wheel is included with this tool.  
11  
 
ADJUSTMENTS  
GUARD ADJUSTMENT  
See Figure 6 - 8.  
A
Never use the angle grinder without the guard in place and  
properly adjusted.  
Unplug the angle grinder.  
Using the wrench provided, loosen and remove flange  
nut, accessory wheel, and disc flange from spindle if  
necessary.  
Using a screwdriver, loosen the clamp screw.  
CORRECT  
LOCATION OF GUARD IS  
BETWEEN POINTS A AND B  
Rotate the guard to its correct position as shown in  
Fig. 6  
figures 6 and 7.  
Retighten clamp screw securely.  
B
WARNING:  
Never place the guard so that it is on front of the angle  
grinder as shown in figure 8. This could result in serious  
injurybecausesparksandlooseparticlesthrownfromthe  
grinding wheel would be directed toward the operator.  
Always place the guard in the correct location as shown  
in figures 6 and 7.  
Fig. 7  
INCORRECT  
LOCATION OF  
GUARD  
DANGER:  
Never use your grinder with the guard removed. It has  
been designed for use only with the guard installed.  
Attempting to use grinder with guard removed will result  
in loose particles being thrown against the operator  
resulting in serious personal injury.  
Fig. 8  
12  
 
MAINTENANCE  
To replace the guard:  
WARNING:  
Unplug the angle grinder.  
Depress spindle lock button and rotate flange nut with  
provided wrench until spindle locks.  
Using the wrench provided, loosen and remove nut,  
grinding or accessory wheel, and disc flange from spindle  
if necessary.  
When servicing, use only identical replacement parts.  
Use of any other parts may create a hazard or cause  
product damage.  
NOTE: To prevent damage to the spindle or spindle lock,  
always allow motor to come to a complete stop before  
engaging spindle lock.  
WARNING:  
Always wear safety goggles or safety glasses with side  
shields during power tool operation or when blowing dust.  
If operation is dusty, also wear a dust mask.  
Using a screwdriver, loosen the clamp screw.  
Remove the guard.  
Place the new guard on the shoulder of the bearing cap,  
aligning the arrow with the slot on the bottom of the angle  
grinder.  
GENERAL MAINTENANCE  
Avoid using solvents when cleaning plastic parts. Most  
plastics are susceptible to damage from various types of  
commercial solvents and may be damaged by their use. Use  
clean cloths to remove dirt, dust, oil, grease, etc.  
NOTE: If the new guard will not fit, loosen the clamp  
screw until they slide over the bearing cap. Be sure the  
tabs on the guard are seated in the groove in the bearing  
cap.  
Rotate guard to the correct position as shown in figures  
6 and 7.  
WARNING:  
Tighten clamp screw securely.  
Do not at any time let brake fluids, gasoline, petroleum-  
based products, penetrating oils, etc., come in contact  
with plastic parts. Chemicals can damage, weaken or  
destroy plastic which may result in serious personal  
injury.  
TO  
TIGHTEN  
WRENCH  
Electrictoolsusedonfiberglassmaterial,wallboard,spackling  
compounds, or plaster are subject to accelerated wear and  
possible premature failure because the fiberglass chips and  
grindings are highly abrasive to bearings, brushes, commu-  
tators, etc. Consequently, we do not recommend using this  
toolforextendedworkonthesetypesofmaterials. However,  
if you do work with any of these materials, it is extremely  
important to clean the tool using compressed air.  
TO  
LOOSEN  
FLANGE  
NUT  
GRINDING  
WHEEL  
DISC  
FLANGE  
LUBRICATION  
All of the bearings in this tool are lubricated with a sufficient  
amount of high grade lubricant for the life of the unit under  
normal operating conditions. Therefore, no further lubrica-  
tion is required.  
GUARD  
CLAMP  
SCREW  
WARNING:  
SPINDLE  
To prevent accidental starting that could cause possible  
serious personal injury, turn off the tool, and unplug the  
angle grinder before performing any maintenance or  
adjustment.  
GUARD REPLACEMENT  
See Figure 9.  
BEARING CAP  
After extended use, the guard may become worn and need  
adjustment or replacing. Or, if you droptheangle grinder and  
damage the guard, it may be necessary to replace it.  
SPINDLE  
LOCK  
Fig. 9  
13  
 
OPERATOR’S MANUAL  
4-1/2 in. ANGLE GRINDER  
DOUBLE INSULATED  
AG402  
WARNING:  
Some dust created by power sanding, sawing, grinding, drilling, and other construction activities con-  
tains chemicals known to cause cancer, birth defects or other reproductive harm. Some examples of  
these chemicals are:  
•lead from lead-based paints,  
•crystalline silica from bricks and cement and other masonry products, and  
•arsenic and chromium from chemically-treated lumber.  
Your risk from these exposures varies, depending on how often you do this type of work. To reduce your  
exposure to these chemicals: work in a well ventilated area, and work with approved safety equipment,  
such as those dust masks that are specially designed to filter out microscopic particles.  
• SERVICE  
Now that you have purchased your tool, should a need ever exist for repair parts or service,  
simply contact your nearest Authorized Service Center. Be sure to provide all pertinent  
facts when you call or visit. Please call 1-800-525-2579 for your nearest Authorized  
list of Authorized Service Centers.  
• MODEL NO. AND SERIAL NO.  
The model number of this tool will be found on a plate attached to the motor housing.  
Please record the model number and serial number in the space provided below.  
• HOW TO ORDER REPAIR PARTS  
When ordering repair parts, always give the following information:  
AG402  
• MODEL NUMBER  
• SERIAL NUMBER  
Ryobi® is a registered trademark of Ryobi Limited used under license.  
ONE WORLD TECHNOLOGIES, INC.  
1428 Pearman Dairy Road, Anderson, SC 29625  
Phone 1-800-525-2579  
983000-997  
06-07-07 (REV:01)  
 

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